runit is a cross-platform Unix init scheme with service supervision,
a replacement for sysvinit, and other init schemes. It runs on
GNU/Linux, *BSD, MacOSX, Solaris, and can easily be adapted to
other Unix operating systems.

Log message:
Minor tweaks:
* Update DESCR and COMMENT with text from home page.
* Shorten HOMEPAGE definition and use it for MASTER_SITES.
* Replace post-patch and do-build with djbware.mk equivalents.